Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2015		Sep. 30, 2014		Sep. 30, 2015		Sep. 30, 2014
Allowance for Loan Losses:
Beginning balance	$ 19,861		$ 18,255		$ 18,839		$ 20,068
Provision for loan losses	1,050	[1]	1,530	[2]	3,650	[1]	2,435	[2]
Loans charged off	(3,295)		(2,656)		(6,597)		(7,142)
Recoveries	2,309		378		4,033		2,146
Ending Balance	19,925		17,507		19,925		17,507
Commercial Portfolio Segment [Member]
Allowance for Loan Losses:
Beginning balance	10,931		10,850		10,915		12,450
Provision for loan losses	1,338	[1]	589	[2]	1,505	[1]	270	[2]
Loans charged off	(1,874)		(1,310)		(2,482)		(2,956)
Recoveries	1,694		51		2,151		416
Ending Balance	12,089		10,180		12,089		10,180
Residential Portfolio Segment [Member]
Allowance for Loan Losses:
Beginning balance	1,760		1,374		1,374		1,585
Provision for loan losses	158	[1]	72	[2]	811	[1]	84	[2]
Loans charged off	(220)		(153)		(626)		(958)
Recoveries	196		34		335		616
Ending Balance	1,894		1,327		1,894		1,327
Consumer Portfolio Segment [Member]
Allowance for Loan Losses:
Beginning balance	4,678		3,769		4,370		3,650
Provision for loan losses	1,052	[1]	1,047	[2]	2,520	[1]	2,380	[2]
Loans charged off	(1,201)		(1,193)		(3,489)		(3,228)
Recoveries	419		293		1,547		1,114
Ending Balance	4,948		3,916		4,948		3,916
Unallocated
Allowance for Loan Losses:
Beginning balance	2,492		2,262		2,180		2,383
Provision for loan losses	(1,498)	[1]	(178)	[2]	(1,186)	[1]	(299)	[2]
Loans charged off	0		0		0		0
Recoveries	0		0		0		0
Ending Balance	$ 994		$ 2,084		$ 994		$ 2,084

[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOmI4NGY3NTUyYjE4MjRmY2M5YTk1ZTQ3NTczOTYwYTEzfFRleHRTZWxlY3Rpb246QTI2QTg5OTAxMkRGQTU4OEIwRTkyNzMyOUNGRjA2NkYM}

[2] Provision before decrease of $24 thousand in 2014 for increase in FDIC indemnification asset